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Results for “Tooth, Deciduous”

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At least 1,009 records · Page 56Linked to original sources
PubMed1991

[Extremely delayed mineralisation of a first premolar in conjunction with submerged deciduous molars--a case report].

This case report presents a patient with extremely delayed mineralisation of a first upper right premolar and simultaneously congenitally missing second premolars. While the germs of the first premolars are usually detectable on dental X-ray films at the age of three or four years, the demonstrated patient was older than 13 years when the first premolar became visible. As the right first bicuspid actively erupted normal root growth took place, and once the tooth is in its normal position its anatomy can be considered normal. With the eruption of the permanent tooth the periodontal situation improved considerably in the region where depression of its predecessor had taken place. As a practical clinical consequence one should take into consideration that mineralisation of a first premolar can be extremely delayed in cases with congenitally missing second premolar teeth.

Adult↗
PubMedDate not supplied

[Deciduous dentition and orthognathodontic prevention. 2].

One of the main factors in the prevention of malocclusion is the preservation of healthy primary dentition until the time of normal shedding. By this contribution the Authors describe the restorative procedures and the pulp and canal treatments to be applied in deciduous dentition as well as the clinical and therapeutic problems connected with the early loss and the abnormal persistence of deciduous teeth. These therapeutic measures, in addition to caries prevention, have a very important role in the promotion of the normal development of occlusion.

Child↗
PubMed2007

Dental and facial bone abnormalities in pyknodysostosis: CT findings.

Pyknodysostosis is an autosomal-recessive disorder of osteoclast dysfunction causing osteosclerosis, with associated maxillofacial anomalies. Multidetector CT with multiplanar and 3D reconstruction illustrated the pathologic findings in this case. Abnormalities included multiple retained deciduous teeth, unerupted teeth with associated follicles, an irregularly expanded alveolus and body of the mandible, and an obtuse mandibular angle. Volume-rendered imaging better delineated the irregular dentition, with crowding and retention of deciduous teeth.

Adult↗
PubMed1988

The origin of tooth number of the human deciduous dentition: a hypothesis.

The constant number of 5 teeth per quadrant in the human deciduous dentition is seen to be a result of the mitotic activity within the dental lamina which leads to a constant number of centers in which cells are compressed together. These centers in which, due to the compression, the cells become narrow and cylindrical and, due to subsequent bulging, wedge-shaped, are the prerequisite for the formation of the constant number of five tooth buds per quadrant.

Dentition↗
PubMed2005

Ectopic eruption of the maxillary first permanent molar: characteristics and occurrence in growing children.

The purpose of this study was to determine the characteristics and occurrence of the ectopic eruption of the maxillary first permanent molar in a sample of growing Spanish children. A descriptive, observational, retrospective study was done using the radiographs of 509 consecutive patients, who were in the first phase of mixed dentition. A method was designed to evaluate the amount of pathologic resorption of the second maxillary primary molar and the impaction of the first permanent molar measured in millimeters. Statistical analysis of the studied variables was done using chi-square, analysis of variance, and Pearson correlation coefficient. The frequency of occurrence was 4.3% with no differences in both sexes. Of these, 36.4% were unilateral and 63.6% bilateral with a right:left relation of 3:1. Of the 36 ectopic molars, 69.4% self-corrected spontaneously. In such cases, the pathological resorption of the root of the second maxillary primary molar and its adverse clinical implications were persistent. The relation between self-correction and impaction was 2.27:1. The average impaction on the right side was 2.91 mm and 1.6 mm on the left side. Correlation between the magnitude of resorption and grade of impaction was not observed. Although resorption was found on grades I and II, spontaneous self-correction could occur without arch length loss. However, on grade III or more, therapeutic intervention has to be done. The benefit of early diagnosis and treatment of the maxillary first permanent molar is the prevention of the premature loss of second maxillary deciduous molar and the resulting malocclusion.

Analysis of Variance↗
PubMed2006

Dilacerated unerupted central incisor: A case report.

Dilaceration of permanent successors is one of the most common complications of trauma to the deciduous teeth. It is advisable to keep these patients under observation post-trauma and to consult an orthodontist at an early stage to prevent unfavorable sequelae. Presented here is a typical case of dilaceration.

Child↗